Other Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2014

Other Accrued Liabilities [Abstract]

Components of other accrued liabilities

Other accrued liabilities consisted of the following:

	December 31, 2013		September 30, 2014
Accrued systems rental and maintenance costs	$	1,488	$	1,320
Accrued site rental fees	999		938
Accrued property and sales taxes payable	10,253		9,435
Accrued self-insurance expense	1,635		1,734
Deferred gain on sale of equipment	319		312
Other accrued expenses	7,308		9,056
Total	$	22,002	$	22,795